Skiving-machine.



Patented Mar. 21, 1916.

3 SHEETS-SHEET I.

INVEN'I'EH/ J. H. REED.

SKIVING MACHINE.

APPLICATION FILED IUNEIZ. 1915.

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J. H. REED.

SKIVING MACHINE.

APPLICATION FILED JUNE 12, 1915.

Patented Mar. 21, 1916.

3 SHEETS-SHEET 2.

-70 HIIIIIIIIIII W III Mm 1. H. REED.

SKIVING MACHINE.

APPLICATION FILED JUNE 12, 1915.

I Patented Mar. 21, 1916.

3 SHEETS-SHEET 3.

INvENmv: 6M

JAMES H. REED, or

LYNN, MASSACHUSETTS ASSIGNOR OF ONE-HALF TO DANIEL A.

SUTHEIRLAND, OF LYNN, MASSACHUSETTS.

SKIVING-MAGI-IINE.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed June 12, 1915. Serial No. 33,796.

To all whom it may concern:

Be it known thatl, JAMES H. REED, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented a certain new and useful Improvement in Skiving-Machines, of

of material. Other skived or scarfed articles my be made by the use of my machine.

One object of the invention is to provide a machine which will make it possible to employ in the manufacture of stiffeners for boots and shoes straw boarder like material of a brittle characterhaving relatively small tensile strength. Heretofore it has been found impractical to use such material for these purposes because it is likely to be torn or broken as it passes through the ordinary counter skiving machine.

Another object of my invention is to produce a machine capable of automatic operation.

My machine consists essentially in mechanism for punching out of a strip of suitable material a blank of the size of the finished article in combinatio with means which deposits the blank in a matrix; it includes the employment of a partial vacuum to hold the said blank in a matrix, and of a rotating cutter operating in substantially the plane of the face of the matrix for removing the surplus stock.

I am aware that a partial vacuum has been used to hold a blank in a matrix but I believe myself to be the first to deposit the blank directly in the matrix by, the punch or by mechanism operated by or in combination with the punch, the blank being held in the matrix thereafter by a partial vacuum. I also believe myself to be the first to use a disk cutter operating in a plane parallel to the face of the matrix to remove the surplus stock from the blank. I therefore desire to claim these features of my invention in the broadest possible manner. In the following specification I have described a novel disk cutter by means of which the operation of removing the' surplus stock from the blank is performed. lVhen used in combination with the other elements herein described I find that this cutter removes the surplus stock uniformly over the entire surface of the blank giving to the finished article the exact shape intended to be made from the particular matrix employed. Furthermore, the surface produced by my improved disk cutter is smooth and free from scars, gouges, indentations Or ridges, and has an appearance much like that of a blank which has been skived and then scoured by hand. Greater uniformity of work may however be produced by the hereinafter described machine. Other features of the invention are also hereinafter described and claimed.

My invention will be fully understood from the following description when taken in connectionwith the accompanying drawings and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings Figure l is a side elevation partly in section of the machine embodying my invention. Fig. 2 is a top plan view of the parts shown in Fig. 1. Fig. 3 is a section on line 33 of Fig. 2. Fig. i is an elevation of the punch and related parts as viewed from the left of Fig. 1. Fig. 5 is a transverse section of one of the matrices being taken on line 5-5 of Fig. 2. Fig. 6 is a plan view of the punch, matrix carrier and disk cutter showing the parts in the position occupied by them at the time the punching takes place.

Referring to the drawings, at 11 is indicated the matrix carrier, at 12 (see also Fig. 4:) the punch and at 13 the disk cutter. The material from which the stiffener blanks are to be formed is preferably cut'into strips and fed from left to right as shown in Fig. 2 through the feed slot 14 (see Fig. 1). It is then in a position to be operated upon by the punch 12. The punch 12 is secured to the lower end of a punch slide 15 sliding in ways in the frame 16. The punch is operated by a connecting rod 17 and crank 18 on the shaft 19, and said shaft is rotated by gears 20 and 21, the machine being driven by a belt wheel 22. The gears 20 and 21 conveniently bear a relation to each other of punch may be power-- trix carrier is formed integral with the spin-' dle 25 having a shoulder 26 which rests on a portion of the frame 27 and forms abearing on which the matrix carrier can rotate. The matrix forms the punch bed against which the punch acts; therefore at the point beneath the punch, there is pro vided an abutment 122 forming part of the frame. This assures that the matrix carrier will be properly supported to resist the pressure put upon it by the punch. At 28 is shown a gear fast to said spindle 25 by which the matrix carrier is actuated. Said gear 28 meshes with a gear 29.

On the top of the matrix carrier are located a plurality of matrices which are hollowed out as shown at 41 to a shape to 'correspond with the'form of the shoe stiffener or counter which is to be manufacturedy Each of the matrlces is provided with m1- nute spurs 80 which prick into the leather and prevent any lateral movement of the blank. The matrix is conveniently formed in the face of a separate metal plate or insert 42 which may be cast from the required stifiener as a pattern in the manner. well known to those skilled in the art. The ma trix is perforated as shown at 43 over a large portion of its area and particularly around the edges and at the ends and the perforations communicate with the spaces 44 and 45 which themselves communicate with the appropriate cavity 23 in the matrix carrier. The spindle 25 is hollow and contains within it a tubular. valve member 46 having a passage 47 therein communicattake place.

ing by the port48 with ports '49 which lead into the respective cavities 23 in the matrix carrier. The lower end of the tubular valve member 46 is connected to a pipe50 which leads to an air pump 51 by means of'which a partial vacuum may be created in the said. cavity 23 in the matrix carrier. At 53 '(see also Figs. 2 and 6) isshown a port following the periphery of the valve 46 and communicating with the port 48. It will be noted that the surfacefa ofthe valve and the corresponding surface of the matrix carrier are conical so that means of'the nut 55 and'washer 56.. 7

It will be understood of course that the matrix carrier 11 comes to rest with one of thelmatrices underneath the punch 12and that the outline of the matrix and of the edge of the punch are of identical shape so they will tend to keep tight in spite of any wear which may The wear may be taken up by that the blank cut out by the punch from the strip of material may be deposited therein by mechanism which will now be described.

At 57 is shown a fork pivoted at 58 to the frame. of the machine on opposite sides 7 of the axle 19. This fork extends around the crank 18 and connecting rod 17. At 59 and 60 are showntw'o slide rods guided in holes in the punch slide 15. The said holes j on the crank pin 18 and adaptedto contact with the" transverse portion of the fork 57. It will therefore be seenthat each timethe shaft 19 rotates the fork which rests on the heads of the sliding rods 59 and GOwill be depressed and the presser 66 will tend to force the blank which has just been cut out by the die down into the matrix which is directly beneath the presser. derstood that atthis time a vacuum is being formed in the'space 23 beneath the matrix so that until released'the blank will be held thereby firmly into the matrix.

The succeeding movement of the matrix carries the blank past the skiving mecha nism by means of whichthe surplus stock is removed. For this purpose,I employ a rotating disk cutter :13 the under surface of which is in the plane of the upper surface of the finished blank. The disk cutter 13 has teeth Z) eachhaving a, curved cutting edge on the side of the tooth toward the direction of rotation. Since each tooth is inclined, it has a drawing actionland therefore tends to produce a clean cut. The teeth I) are arranged in groups separated by clearing teeth 0 having a radial surface in the clirection of rotation and which perform the function of removing the bulk of the stock and of throwing the chips or shavings cut by the teeth Z) out of the scarf thus prevent ing clogging, excessive friction and conse quent heating. The teeth 6 shave the surface of the stock and leave it perfectly in will be un V smooth. The cutter 13 is mounted on a shaft Y 69 and is driven by the belt 70. I find in practice that a cutter of the type described l produces a very smooth surface substantially like that produced by a bufiing machine.

adapted for use in the manufacture'of shoe stifl eners from material such as straw board andthe like which is brittle and has relaequally good results when 2 operating on. leather, or leather board;

'tively low tensile strength. It produces he gear 28 which rotates the matrix carrier 11 is an intermittent gear and meshes w1tn the gear 29 as shown in the drawmgs, the

parts being so constructed that the matrix carrier will be stopped in four positions during each revolution. Special mechanism is also provided so that the suction through the perforations in the matrix will occur during only the desired portion of the revolution of the matrix carrier. The suction on the matrix which is below the punch begins just as soon as the punching has been done and the blank is pressed into the matrix. The suction on this matrix is retained until after the matrix has passed by the cutter. This is accomplished by giving to the tubular valve 6 a rotary motion properly timed with relation to the other parts. At 72, is shown a collar secured to the tubular valve member and provided with an arm 73 which projects into the path of a corresponding arm 7% on a collar on the shaft 69. It will therefore be seen that each time the shaft 69 rotates, the arm 74lwill contact with the arm 73 and will move it together with the tubular valve member through an arc of a circle approximately 90 degrees in length. This movement is properly timed by the positioning of the collar 7 5 on the shaft. At the end of its arc of movement the arm 7 rides off the end of the arm 74 and a spring 85, connected at 86 to fixed part of the machine pulls the arm 78, collar 72, and tubular valve back into the position shown in Fig. 6. This movement is timed so that the valve member will come to rest in the position shown in Fig. 6 just at the instant the punch cuts out the blank. At this time the cavity beneath the matrix which is under the punch, and that which is under the disk cutter are connected with the interior of the valve member by the ports 49, 49 respec tively, and the port L8 and peripheral port in he tubular valve member. The parts in this position will be clearly seen by reference to Fig.6.

From the foregoing, it will be seen that the suction on the blank is maintained from the time it is pressed into the matrix by the presser 66 until after it has passed by the disk cutter by which the skiving is performed. The suction is released by the leak- At 85 and 86 are shown two pins passing down through the matrix carrier provided with collars 87 and 88 against which rest springs 89 and 90, the other end of which rests against the upper side of the cavity 23 under the matrix. At 91 is shown a stationary cam having a flat surface 6 and an inclined surface 7' supported on a portion of the frame 27. It will therefore be seen that as the matrix carrier revolves the pins 85 and 86 ride up the inclined surface 7 on the flat surface 0 thereby pushing the blank up out &

of the matrix into position to be seized by the feed grippers, not shown, of a counter molding machine which may be operated in connection with the skiving machine, if desired.

t will be seen that the mechanism described alfords means for dieing out the blank from a strip of material, pressing it into the matrix, ransporting it to the skiving position, skiving it and carrying it to a releasing position without any manual action on the part of the operator.

lVhat I claim is:

1. The improved skiving machine comprising a matrix adapted to move in a given plane, means for holding a blank in the matrix, and a disk cutter arranged to rotate adjacent the matrix substantially in the plane defining the edges thereof.

:2. The improved skiving machine comprising a matrix, means for holding a blank in the matrix, and a disk cutter having a pl irality of knife edged teeth and arranged to rotate with the cutting edge of said teeth adjacent said matrix substantially in the plane defining the edges thereof.

3. The improved skiving machine comprising a perforated matrix, means for creating a. vacuum beneath the work in the matrix and adisk cutter, arranged to rotate above the matrix substantially in the plane defining the edges thereof.

The improved skiving machine comprising a matrix carrier having a matrix thereon, a punch in line with said matr'x, and a cutter to remove surplus stock from a blank in said matrix, said carrier being movable to move the matrix after the punching operation from the punch to the cutter.

5. The improved skiving machine comprising a punch, a matrix operating as a bed for the punch, a movable carrier therefor, and a cutter to remove surplus stock from a blank in said matrix, said carrier operating to transfer the blank while in the matrix from the punching position to a position to be operated upon by the cutter.

The improved skiving machine comprising a punch, a cutter, and a matrix arranged to receive a blank and to carry it to said cutter.

7. The improved skiving machine comprising a matrix, a matrix carrier, a punch and a cutter, and means for creating a vacuum beneath a blank in said matrix, said matrix operating as a bed for the punch, whereby the blank is deposited directly in the matrix by the punch and is maintained. in position by the said vacuum for presentation to the cutter.

S. The improved skiving machine comprising a movable matrix and a punch, said matrix operating as a bed for the said punch and a presser within the said punch to press the blank into the matrix. 4

from said punch lit.)

9. The improved skiving machine comprising a matrix, a movable carrier, a punch, a presser, a cutter, and means for forming a vacuum under the matrix to hold a blank therein, said matrix operating as a bed for the punch whereby the said punch and presser deposit the said blank in the said matrix for presentation by the matrix carrier to the cutter.

10. In a machine of the character described in combination a punch, a matrix cooperating with the said punch as a bed and a presser within said punch.

11. The improved skiving machine comprising a movable matrix, a punch having a cavity therein, said matrix operating as a bed for the said punch, and a presser within the said punch comprising a resilient member of substantially the size and shape of the cavity within the said punch.

12. The improved skiving machine comprising a movable matrix and a punch having a cavitv therein, said matrix operating as a bed for the said punch, a presser within the said punch comprising a resilient pad of substantially the size and shape of the cavity within the said punch, and means for moving the said presser relatively to the said punch. V

13. The improved skiving machine comprising a movable matrix and a punch, said matrix operating as a bed for the said punch,

a presser within the said punch, slide pins on which the said presser is mounted, actuating means for the said punch and a cam carried by the said actuating means to move the said slide pins and operate the said presser.

14-. The improved skiving machine comlation to said punch while the cavity of another is in operative position with relation to said cutter, means for creating a vacuum, and a valve connecting the source of said vacuum with the two cavities which are in operative position with relation to-said punch and cutter.

15. The improved skiving machine comprising a rotating matrix carrier, a plurality of matrices on one face of said carrier, a punch cooperating with sald matrlces and a fixed support on the other face of said ma-' trix carrier and in line with the said punch.

16. The improved skiving machine comprising a matrix, means for holding the work in the matrix and a rotating cutter in the plane of the matrix, said cutter having a plurality of knifeshaped teeth with the cutting edge in the plane of the matrix and other teeth for clearing the chips from the scarf which have been removed by said cutting teeth interspersed among said knifeshaped teeth, said teeth having 'a cutting edge at right angles to the plane of the matrix.

In testimony whereof I aflix my signature, inpresence of two witnesses.

JAMES H. REED. Witnesses ])ANIEL A. SUTHERLAND, GEORGE P. DIKE.

Copies of this patent may be obtained for five cents-each, by addressing the Commissioner of Patents,

Washington, D. C. I 

